Re: Samsung LN52A650 Visual Artifacts & Repeatedly Power Cycles

Figured I'd update the thread, the TV is still going strong to this day and it's used every day very heavily. I had an issue a couple weeks in where one of the caps lost connection to the board because of the different footprint of the caps themselves, but a quick reflow and additional solder added and it's been fine ever since. Both C102 and C131 were replaced as a precautionary measure.

Re: Samsung LN52A650 Visual Artifacts & Repeatedly Power Cycles

This repair worked wonderfully for my Samsung 52" LN52A550P3FXZA LCD from 2008. I believe a bad cap on the power supply board started this mess, at least for me. Could have simply been a coincidence though. The problem got bad fast until I replaced the power supply cap and all like it, thinking that was the culprit. The problem didn't get worse for a month until I had the time to complete the repair. I replaced both c102 as well as c131, however the originals had slightly different markings. c102 had "NEt...

Re: Dell Genesis 1702FP Whining Sounds

I honestly forgot about the monitor.. it recently started flickering when a lot of white is being displayed, so I took it apart, flowed some flux under the GPU, preheated the board with a heat gun and heated the GPU to about 250 degrees to reflow it. Put it back together, and it no longer flickers, but is still making the whining noises as before.. I was hoping doing that would fix it XD

Re: Dell Genesis 1702FP Whining Sounds

I will post pictures soon. I honestly didn't think of that. The first test was with the multimeter leads stuck into the socket, so it was not powering anything. With the monitor running, the voltage stayed at 13. The supply and monitor are over ten years old, so I'm not very trusting in them. Honestly, I probably should be looking at a new monitor, but it looks so crisp and clear and accepts DVI as well as VGA. I'd like to keep it going as long as I can if at all possible.

Looking at the main board, there are no visible scorch...

Re: Dell Genesis 1702FP Whining Sounds

Happy holidays everyone!

Okay so I have some good news and bad news.. It seems like the PSU is okay. I tested it with a multimeter and it's reading as 13 volts (it's labeled for 14) and the amps aren't measuring, maybe I'm doing it wrong. I tried removing the board while it's powered on to try and isolate the noise, and it still seems like it's coming from the main processing chip. Unplugging the backlight inverter board doesn't change anything, but unplugging the panel and leaving the backlight does make it stop. The noise actually...

Re: Dell Genesis 1702FP Whining Sounds

I listened to the board and it seemed to be the chip. I don't remember if there is an inductor near it or not.. Flexing the board does actually have an effect on it.

I have a Dell 1702FP from 2001 to 2002. I got it from a friend, and they never really used it throughout the years, so it still runs perfectly well and has a great picture. Except this annoying whining noise. It seems to change based on how many black or white pixels there are. If the screen is mostly white, then the noise is very annoying and high frequency. If the screen is mostly black, then the noise almost goes away entirely. Opening up the monitor, the whine is coming directly from the processing chip that says "Dell Genesis" on it.

What's worse, is now that feedback...